Equine
influenza virus, A/Equi-2/Ludhiana/87 H3N8 isolated from influenza epizootic in
India
in 1987 was
characterized
for its uniqueness by sequencing of its neuraminidase gene as the vaccine
prepared with this isolate is
still
in use and has not been updated for more than a decade. Comparison of the
nucleotide and amino acid sequences
of
this gene with other H3 N8 isolates revealed that Indian isolate had maximum
differences with avian like equine
influenza
isolate (Jilinl89) and had resemblance with equine influenza H3N8 isolates
namely Alaska/91,
Tennessee/86,
NewmarketJ79 and KentJ87 which further indicated that it belongs to the lineage
of currently
circulating H3N8 equine viruses in equine population.

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